188 C'AMKORNIA ACADEMY OF SCIENCES. 



PLATE LI I. 



ALEODKILUS KEYESI. 



82. Section through (he epithelium of tubulitr intestine, showing a cluster of glands between the epithelial cells. 



III. blood liiciiii''. 



83. Section through one of the valves of the heart. I. c, large cells at the base of the valves. 



84. Some spermatogonia from the sperm-sacs in xii. 



8.5. Cells from the central gerrainative and in the sperm-sac. 



86. One of the uephridia with an anterior lateral vessel, connecting dorsally with a branch from the ventral vessel. 



d. V. diverticula of the lateral vessel, lal. v. lateral vessel. 



ACANTHODRILUS TAMA.JUSI. 



87. The largest of my specimens, natural size. This specimen is strongly contracted, ond was when alive con- 



siderably longer. 



88. The anterior somites, ventral view. 



89. The anterior somites, dorsal view. 



90. The anterior somites, side view. 



91. The ventral part of the genital region in the clitellum, showing genital papillrt*, the three transverse genital 



ridges, penial setie, common seta», etc. The clitellum is not well developed, but in somite xx may be seen its 

 posterior termination. The other one of my specimens, which possessed a more developed clitellum, had 

 these papillic less pronounced, though of the same form and arrangement. 

 9"2. Cross-section of the body-wall, showing the common setie. 



93. The free end of the penial seta. 



94. The spermathecie, dorsal view. 



95. One of the spermathecw dissected out. 



